Malicious PDF — malware analysis report

Static analysis result for SHA-256 64eb39ffae33fbfe…

MALICIOUS

PDF

69.3 KB Created: 2021-02-08 06:15:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f879d600ae0b71b35bfd0db6bf75ce45 SHA-1: 2cc1e155116b09ad30838c3e6a018390db1b7ba7 SHA-256: 64eb39ffae33fbfeddd996a258ff52f47af7f555f04821827dbbe07eeb527e98
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/aws?utm_term=chocolate+rain+piano+sheet+music PDF link annotation
    • http://betmoy57.com/starlink_free_weapons82mpf.pdfIn PDF document text
    • http://bighome.space/xumikaafpds.pdfIn PDF document text
    • http://khareedforosh.com/jilos05t8l.pdfIn PDF document text
    • http://instahelpforbusiness.com/polk_surroundbar_5000_remote_batteryffu3r.pdfIn PDF document text
    • https://tutemedoz.weebly.com/uploads/1/3/2/8/132814241/setitumakogujolotami.pdfIn PDF document text
    • http://cooldomen.space/bubble_pop_hyuna_lived494p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378155/normal_6018bbcbbe863.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/50160169869.pdfIn PDF document text
    • http://todosix.epizy.com/dobipamurejubemafesora.pdfIn PDF document text
    • http://rogitini.epizy.com/human_body_systems_worksheets_high_school.pdfIn PDF document text
    • http://wavemidafezan.rf.gd/tesaxeguzefu.pdfIn PDF document text
    • http://diwomikutaz.epizy.com/present_continuous_tense_worksheets_for_class_3.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/soneja.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/7122661336.pdfIn PDF document text
    • http://jisufuwoj.epizy.com/able_excel_calendar_templates.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F3 5076 bytes
SHA-256: 13c23fee005909a15ca520178df4b7523f77c900263795d5642a25043c65162c
font_01_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 10344 bytes
SHA-256: cf1097d01ab6690eb7c04a7e857635c7bb2417e080750ee63e443626b1c6da80

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